package com.myboxlab.aop;

import java.util.Arrays;

import javax.servlet.http.HttpServletRequest;

import org.apache.log4j.Logger;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

/*
 * Pointcut定义一个切入点，可以是一个规则表达式
 * 
 * Before在切入点开始处切入内容
 * After在切入点结尾处切入内容
 * AfterReturning在切入点return内容之后切入内容（可以用来对处理返回值做一些加工处理）
 * Around在切入点前后切入内容，并自己控制何时执行切入点自身的内容
 * AfterThrowing用来处理当切入内容部分抛出异常之后的处理逻辑
 * 
*/

@Aspect
@Component
public class WebLogAspect {

    private Logger logger = Logger.getLogger(getClass());

    @Pointcut("execution(public * com.myboxlab.web..*.*(..))")
    public void webLog() {
    }

    @Before("webLog()")
    public void doBefore(JoinPoint joinPoint) throws Throwable {
        // 接收到请求，记录请求内容
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
                .getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

        // 记录下请求内容
        logger.info("URL : " + request.getRequestURL().toString());
        logger.info("HTTP_METHOD : " + request.getMethod());
        logger.info("IP : " + request.getRemoteAddr());
        logger.info("CLASS_METHOD : " + joinPoint.getSignature().getDeclaringTypeName() + "."
                + joinPoint.getSignature().getName());
        logger.info("ARGS : " + Arrays.toString(joinPoint.getArgs()));

    }

    @AfterReturning(returning = "ret", pointcut = "webLog()")
    public void doAfterReturning(Object ret) throws Throwable {
        // 处理完请求，返回内容
        logger.info("RESPONSE : " + ret);
    }

}
